No problem, we've got 3923 and 3947 to multiply
3923 × 3947 = 3947 × (3923)
+ 3947 × 3 resulting in 11841
+ 3947 × 20 resulting in 78940
+ 3947 × 900 yielding 3552300
+ 3947 × 3000 which equals 11841000

= 15484081
